At 6-7, 270 he seems bigger than our recent OLB's. Miller & Obo were both in the 250's. Floyd, Garret & Hollins are listed in thier 240's. (Lewis is 260) I would think that if they wanted a bigger OLB/DE they would have brought back Morgan Fox.
Nothing against Nassib, but he seems like more of a traditional 4-3 end. (Admittedly that's lost a lot of it's meaning in today's defensive schemes.)